Inking mechanism for rotary printing presses



H. J. LUEHRS Sept. 7, 1937.

INKING MECHANISM FOR ROTARY PRINTING PRESSES Filed April 2, 1936 2 Sheets-Sheet l m T N E V m ATTORNEYS Sept. 7, 1937. H. J. LUEHRS INKING MECHANISM FOR ROTARY PRINTING PRESSES 2 Sheets-Sheet 2 Filed April 2, 1936 ATTORNEYS Patented Sept. 7, 1937 UNITED STATES PATENT OFFICE INKING MECHANISM FOR ROTARY PRINTING PRESSES Application April 2, 1936, Serial No. 72,284

Claims.

This invention is particularly directed to inking mechanisms for high speed rotary printing presses in which low and high speed ink distributing rolls are used because of the necessarily low speed of the fountain roll.

This invention comprises, generally, a ductor roll interposed between the fountain roll and one of the low speed ink distributing rolls, and two additional ductor rolls interposed between one of a low speed distributing roll and a high speed r distributing roll.

the low speed distributing rolls and a high speed distributing roll, said two ductor rolls being operated to alternately contact with the low speed distributing roll and with the high speed distributing roll for ensuring an ample and even supply of ink to the high speed distributing roll.

One object of my invention is to provide means whereby both ends of each of the said ductor rolls are operatively connected to the ductor roll vibrating means to obviate the use of the usual shaft cam and spring means operatively connected to one end onlyof each of the ductor rolls, which means tends to cause a twisting of the ductor shafts and bouncing of the ductor rolls when the press is driven at highspeeds.

Another object is to provide means whereby the said ends of the ductor rolls are independent- 1y adjustable radially and/ or laterally to bring them into accurate positions with respect to their coacting rolls,

A still further object is to provide common cams for controlling the operation of the corresponding ends of the two ductor rolls interposed between A practical embodiment of my invention is represented in the accompanying drawings, in which I Fig. 1 represents a detail .top plan view of that part of an inking mechanism whichincludes my invention;

Fig. 2 represents a detail side view of the same;

Fig. 3 represents a detail cross section, taken in the plane of the line III-III'of Fig. 2, looking in the direction of the arrows; and

Fig. 4 represents a detail section, taken in the plane of the line IV-IV of Fig. 2, looking in the direction of the arrows.

The ink fountain is denoted by l and its fountain roll by 2, which roll may be driven in the usual manner and at a low speed from the rotary crank disc 3 through the connecting rod 4, oscillating lever 5 and its pawl and ratchet connection 6, 'I with the shaft 8 of the fountain roll, which crankdisc 3 is carried by the cam shaft 9.

The low speed ink distributing rolls are denoted the low speed fountain roll 2 and the low speed by 10, I I, I2 and the high speed distributing roll by l3.

A single ductor roll i4 is vibrated between the low speed fountain roll 2 and low speed distributing roll It. Two ductor rolls 15, I6 are vibrated between the low speed distributing roll 82 and the high speed distributing roll l3,

Both ends of all three of these ductor rolls are operatively connected to their respective vibrating means and both ends of these ductor rolls are also independently adjustable radially and/or laterally with respect to their coacting rolls.

Each end of the shaft I! of the ductor roll I4 is rotatably mounted in an arm l8 of a two armed lever I9 pivoted on a studill projecting from a bracket 2|, pivoted to swing on a bolt 22 projecting from the frame 23. The second arm of this rock lever I9 is denoted by 24. This bracket 2! is adjustable tomove the ductor roll it inwardly and outwardly by providing the bracket with a concentric slot 25 through which a bolt 26 projects from the frame 23. A swinging nut 2! on the bolt 25 is engaged by the threaded shank of an adjusting screw 28 rotatably mounted on the bracket 2!. Each lever i9 is rocked from a box cam 29 carried byone end of the shaft 9 as follows: A two armed lever'3 is also pivoted on the bracket stud 20, one arm 3! of which lever carries a stud or roller 32 which travels in the U groove 33 of the box cam 29, the other arm 34 of which lever lies adjacent to the arm 24 of the ductor roll lever 19. The said arm 34 is adjustably connected tothe arm 24 to permit lateral adjustment of the ductor roll M by providing the arm 24 with-a stud .bolt 35 projecting through a slot in thearm 34. Oppositely disposed adjusting screws-36, 31 are carried by the arm 34 in position to engagethe opposite sidesofthe stud bolt 35 whereby the adjustment of these screws will change the relative positions of the arms 24 and 34 of the levers l9 and 30 and thereby the position of the ductor roll [4.

The means for mounting, adjusting and operating the ductor rolls l5 and it which are vibrated between the low speed distributing roll I2 and the high speed distributing roll l3 are quite similar to the means for mounting, adjusting and operating the ductor roll M which is vibrated between distributing roll l0, except that a single box cam 38 located at each end of the cam shaft 39 controls the operation of the corresponding ends of both of the said ductor rolls l5 and [6.

This box cam 38 has a groove 40 at opposite 55 points within which travel the studs or rollers 4!, 42 carried by the arms 43, 44 of the two cam operated levers pivoted on studs 45, 46 projecting from their respective adjustable brackets 41, 48 pivoted at 49, 50 to the frame 23. The outer ends of these brackets have concentric grooves i, 52 through which project studs 53, 54 from the frame 23. Nuts 55, 56 are pivoted on the studs, which nuts are engaged by the threaded shanks of adjusting screws 51, 58 rotatably mounted in lugs 59, 60 projecting from the said brackets 41, 48.

The ductor roll levers are also pivoted on the bracket studs 45, 46, the corresponding ends of the ductor rolls being rotatably mounted in the arms 6|, 62 of the said ductor roll levers. The second arms 63, 64 of the ductor roll levers are operatively connected to the second arms 65, 66 of the cam operated levers through the following adjusting means:

The arms 65, 66 of the cam operated levers carry studs 61, 6B which project through the arms 63, 64 of the ductor roll levers, the opposite sides of which studs 61, 68 are engaged by ad justing screws 69, I6 and H, 12 respectively.

The low and high speed distributing rolls and the cam shafts may be operatively connected through the train of gears l9, l4, l5, l6, l1, l8, 79, 80 and 8!.

From the above description it will be seen that I have provided means whereby each end of each of the ductor rolls may be adjusted radially and/ or laterally to bring the ductor roll into exact contact throughout its length with its coacting rolls as the ductor roll is vibrated, even though the shape and size of the ductor roll be changed due to the use of the ductor roll. These adjustments of the ductor rolls ensure the even transfer of the ink in the desired amounts from one of its coacting rolls to the other of its coacting rolls.

It will also be seen that the positive operation of the ductor roll levers at both ends of each ductor roll prevents torsional strain of the eliminated ductor roll shaft which would tend to twist the same. This positive operation of both ends of each ductor roll also ensures its even and positive movement and eliminates the bouncing of the roll which is liable to happen where the roll is operated at high speeds under a shaft cam and spring control at one end of the roll.

The means for mounting, vibrating and adjusting the ductor roll l4 which is shown and described, but not claimed herein, forms the subject matter of my copending application filed of even date herewith, its Serial N 0. being 72,283.

It is evident that various changes may be resorted to in the construction, form and arrangement of the several parts without departing from the spirit and scope of my invention, and hence I do not intend to be limited to the particular embodiment herein shown and described, but what I claim is:

1. In an inking mechanism for rotary printing presses, a frame, two ductor rolls mounted on separate axes at each side of the frame, and means at each side of the frame operatively connected to corresponding ends of said ductor rolls at each side of the frame for vibrating them in opposite directions, each of said means comprising a cam and two levers operated thereby.

2. In an inking mechanism for rotary printing presses, a frame, a pair of ductor roll levers at each side of the frame, two ductor rolls mounted at their opposite ends in their respective levers, and means at each side of the frame operatively connected to corresponding ends of said ductor rolls at each side of the frame for vibrating them in opposite directions, each of said means comprising a cam and two levers operated thereby and connected to their respective ductor roll levers.

3. In an inking mechanism for rotary printing presses, a frame, a pair of ductor roll levers at each side of the frame, two ductor rolls mounted at their opposite ends in their respective levers, and means at each side of the frame operatively connected to corresponding ends of said ductor rolls at each side of the frame for vibrating them in opposite directions, each of said means comprising a cam and two levers operated thereby and adjustably connected to their respective ductor roll levers.

4. In an inking mechanism for rotary printing presses, a frame, two pairs of brackets independently adjustable thereon at opposite sides thereof, two pairs of ductor roll levers pivoted on said brackets, two ductor rolls mounted at their opposite ends in their respective levers, and means at each side of the frame operatively connected to the corresponding ends of said ductor rolls at each side of the frame for vibrating them in opposite directions, each of said means comprising a cam and two levers operated thereby and connected to their respective ductor roll levers.

5. In an inking mechanism for rotary printing presses, a frame, two pairs of brackets independently adjustable thereon at opposite sides thereof, two pairs of ductor roll levers pivoted on said brackets, two ductor rolls mounted at their opposite ends in their respective levers, and means at each side of the frame operatively connected to the corresponding ends of said' 

